Invoke Method

[Mantorok]

Hi

I have a second thread running and I want to invoke a method in a class on
the 1st thread, how can I do this without using a form?

Thanks
Kev

[Willy Denoyette [MVP]]

Why would you ever need to do this?

Willy.

"Mantorok" <no**@tiscali.co.uk> wrote in message
news:cu**********@newsfeed.th.ifl.net...

Hi

I have a second thread running and I want to invoke a method in a class on
the 1st thread, how can I do this without using a form?

Thanks
Kev

[Mantorok]

I have an asp net app and there is a continuously running thread that
services aspx page responses, but the class that actually kicks off these
pages will run in the first thread, I want to run methods on this class from
the thread in which the class was instantiated, so that I can access the
HttpContext.Current object.

HTMS
Kev

"Willy Denoyette [MVP]" <wi*************@pandora.be> wrote in message
news:OL*************@TK2MSFTNGP15.phx.gbl...

Why would you ever need to do this?

Willy.

"Mantorok" <no**@tiscali.co.uk> wrote in message
news:cu**********@newsfeed.th.ifl.net...

Hi

I have a second thread running and I want to invoke a method in a class
on the 1st thread, how can I do this without using a form?

Thanks
Kev

[John Puopolo]

Hi...

You need some form of inter-thread communication. The architectural manner
in which this is done is via ISynchronizer. You can take advantage of a
system-provided implementation via using a delegate. In other words, from
the 2nd thread, create a delegate that wraps a call to the object/method in
the 1st thread. Then, call Invoke on the delegate. The system will shuttle
the call from the caller to the callee.

John Puopolo

"Mantorok" <no**@tiscali.co.uk> wrote in message
news:cu**********@newsfeed.th.ifl.net...

Hi

I have a second thread running and I want to invoke a method in a class on
the 1st thread, how can I do this without using a form?

Thanks
Kev

[Willy Denoyette [MVP]]

No, this requires a Form and a message pump and that's not what OP was
looking for.

Willy.
"John Puopolo" <jo**********@fastsearch.com.nospam> wrote in message
news:ut**************@TK2MSFTNGP09.phx.gbl...

Hi...

You need some form of inter-thread communication. The architectural
manner
in which this is done is via ISynchronizer. You can take advantage of a
system-provided implementation via using a delegate. In other words, from
the 2nd thread, create a delegate that wraps a call to the object/method
in
the 1st thread. Then, call Invoke on the delegate. The system will
shuttle
the call from the caller to the callee.

John Puopolo

"Mantorok" <no**@tiscali.co.uk> wrote in message
news:cu**********@newsfeed.th.ifl.net...

Hi

I have a second thread running and I want to invoke a method in a class
on
the 1st thread, how can I do this without using a form?

Thanks
Kev

[Willy Denoyette [MVP]]

"Mantorok" <no**@tiscali.co.uk> wrote in message
news:cu**********@newsfeed.th.ifl.net...

I have an asp net app and there is a continuously running thread that
services aspx page responses, but the class that actually kicks off these
pages will run in the first thread, I want to run methods on this class
from the thread in which the class was instantiated, so that I can access
the object.

HTMS
Kev

But, if you call a method on that class you have access to
HttpContext.Current, no matter what thread you are executing this method on,
right?
Sure it's possible you need to synchronize access to the object, but here
you can use .NET's provided synchronizing primitives.

Willy.

[Jon Skeet [C# MVP]]

Willy Denoyette [MVP] <wi*************@pandora.be> wrote:

I have an asp net app and there is a continuously running thread that
services aspx page responses, but the class that actually kicks off these
pages will run in the first thread, I want to run methods on this class
from the thread in which the class was instantiated, so that I can access
the object.

But, if you call a method on that class you have access to
HttpContext.Current, no matter what thread you are executing this method on,
right?

No - the value of HttpContext.Current depends on the calling thread. It
has to, as it's a static property - it couldn't possibly know which
context you're talking about unless it were thread-sensitive.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Willy Denoyette [MVP]]

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

Willy Denoyette [MVP] <wi*************@pandora.be> wrote:

>I have an asp net app and there is a continuously running thread that
>services aspx page responses, but the class that actually kicks off
>these
>pages will run in the first thread, I want to run methods on this class
>from the thread in which the class was instantiated, so that I can
>access
>the object.

But, if you call a method on that class you have access to
HttpContext.Current, no matter what thread you are executing this method
on,
right?

No - the value of HttpContext.Current depends on the calling thread. It
has to, as it's a static property - it couldn't possibly know which
context you're talking about unless it were thread-sensitive.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

Sure you are right, the Context can only be accessed from the thread
executing the request.
So the only option is to make the context object explicitly available to the
thread executing outside the HttpRequest pipeline.

Willy.

[Mantorok]

"Willy Denoyette [MVP]" <wi*************@pandora.be> wrote in message
news:uN****************@TK2MSFTNGP12.phx.gbl...

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

Willy Denoyette [MVP] <wi*************@pandora.be> wrote:

>I have an asp net app and there is a continuously running thread that
>services aspx page responses, but the class that actually kicks off
>these
>pages will run in the first thread, I want to run methods on this class
>from the thread in which the class was instantiated, so that I can
>access
>the object.

But, if you call a method on that class you have access to
HttpContext.Current, no matter what thread you are executing this method
on,
right?

No - the value of HttpContext.Current depends on the calling thread. It
has to, as it's a static property - it couldn't possibly know which
context you're talking about unless it were thread-sensitive.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

Sure you are right, the Context can only be accessed from the thread
executing the request.
So the only option is to make the context object explicitly available to
the thread executing outside the HttpRequest pipeline.

Which begs the question, is that possible?

Kev

[Jon Skeet [C# MVP]]

Mantorok <no**@tiscali.co.uk> wrote:

Sure you are right, the Context can only be accessed from the thread
executing the request.
So the only option is to make the context object explicitly available to
the thread executing outside the HttpRequest pipeline.

Which begs the question, is that possible?

Well, I suspect you could pass the context as parameter, or make it
available to another thread in the way that you make other data
available.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too